bodies, charities, and museums. The energy companies spent funds in order to make Houston a more attractive community for their employees to live in. Petrochemicals Houston is one of the world's largest manufacturing centers for petrochemicals, and the $15 billion petrochemical complex at the Houston Ship Channel is the largest in the country. Supporting the industry is a complex of several thousand miles of pipeline connecting 200 chemical plants, refinery, salt domes and fractionation plants along the Texas Gulf Coast, which allows transfer of feedstocks, fuel and chemical products among plants, storage terminals and transportation facilities. Houston has more than 400 chemical manufacturing establishments with more than 35,000 employees. Houston has two of four largest U.S. refineries. ExxonMobil’s complex in Baytown is one of the oldest in the area and one of the largest of its kind in the world More than 235 establishments in the Houston metro area manufacture plastic and rubber products. Houston dominates the U.S. production of three major resins: polyethylene (38.7% of U.S. capacity); polyvinyl chloride (35.9% of U.S. capacity) and polypropylene (48.4% of U.S. capacity). Aerospace Houston is home to the Johnson Space Center, NASA's largest research and development facility, employing nearly 3,000 federal civil service workers and more than 14,000 contract personnel. Program offices for Project Constellation, Orion, and other new space vehicle projects will create new jobs at the center. The city's burgeoning aerospace industry heralded its second growth spurt, which solidified with the 1973 oil crisis. The majority of the contractor work force related to the projects will also be located at the center. Texas Governor Rick Perry recently announced a $7.5 million Texas Enterprise Fund (TEF) grant to Lockheed Martin, which will bring about 1,000 jobs to the Houston area. The grant ensures that Lockheed Martin will create these jobs in the Houston area after they earned a multibillion-dollar contract from NASA to build the Orion Crew Exploration Vehicle. Houston is also home to the United Space Alliance, which employs well over 10,000 people. Trade Much of Houston's success as a petrochemical complex is due to its busy man-made ship channel, the Port of Houston. The port ranks first in the country in international commerce and is the sixth-largest port in the world. Amid other U.S. ports, it is the busiest in foreign tonnage and second in overall tonnage. Because of these economic trades, many residents have moved to Houston from